Seating unit for a swivel chair



FIG. 1 is a perspective view of the seating unit for a swivel chair from below and one side thereof;

FIG. 2 is a further perspective view of the seating unit for a swivel chair, from above and one side thereof;

FIG. 3 is a front view of the seating unit for a swivel chair and

FIG. 4 is a side view of the seating unit for a swivel chair. 

The ornamental design for a seating unit for a swivel chair, as shown. 